code: def test_LayoutValidator(self):
      validator = self.estimator.get_layout_validator()
      self.assertCountEqual(
          validator.splittable_mtf_dimension_names, ["a", "b", "c"]
      )
      self.assertFalse(validator.is_valid_assignment("a", "m1"))
      self.assertTrue(validator.is_valid_assignment("a", "m2"))
  
file_path: mesh/mesh_tensorflow/auto_mtf/memory_estimator_test.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import mesh_tensorflow
  from mesh_tensorflow.auto_mtf import memory_estimator
  import tensorflow.compat.v1
label_desc: Use image node_id 2 for calling the MemoryEstimatorTest obj's underlying member method code with example usage: obj.test_LayoutValidator() without return types